Shockingly, I didnít contrive to make those numbers turn out to be exactly the same (in fact I examined the Pluto data last night, wrote the value down, and completely forgot it before writing the section on Eris. I had to scroll back up the page to write the size of Pluto, and, I admit, I was a bit stunned). Even if Pluto or Eris had been 10 or 20 km bigger or smaller, it is clear that the only safe statement to make at this point is this: within the uncertainties, we cannot distinguish which of the dwarf planets is the largest.